MongoDB复制集搭建
MongoDB复制集搭建,默认从库不可查询,执行如下语句使得当前从库可以查询,分担主库查询负载
看了mongodb权威指南之后,对于读写分离的方式采用复制集比较合适,一般的系统足够使用了。
很容易找到下载地址,暂不累述,,只描述关键步骤。
2台服务器分别为201和202 共3个节点,2个初始配置在202上,1个后来添加在201上
先部署2个节点
202:
./mongod --dbpath ./db1 --port 10002 --replSet blort/Server202:10001
./mongod --dbpath ./db --port 10001 --replSet blort/Server202:10002
./mongo Server202:10001/admin
db.runCommand({"replSetInitiate":{"_id":"blort","members":[{"_id":1,"host":"Server202:10001"},{"_id":2,"host":"Server202:10002"}]}})
db._adminCommand("replSetGetStatus");
增加一个节点
201:
./mongod --dbpath ./db --port 10001 --replSet blort/Server202:10002
202:
rs.add("Server201:10002");
默认从库不可查询,执行如下语句使得当前从库可以查询,分担主库查询负载
db.getMongo().setSlaveOk()
随机器自动启动脚本在/etc/rc.local
rm -rf /home/aircom/mongodb-linux-i686-2.0.6/bin/db/*.lock
rm -rf /home/aircom/mongodb-linux-i686-2.0.6/bin/db1/*.lock
/home/aircom/mongodb-linux-i686-2.0.6/bin/mongod --dbpath /home/aircom/mongodb-linux-i686-2.0.6/bin/db --port 10001 --replSet blort/Server202:10002 --fork --logpath /home/aircom/mongodb-linux-i686-2.0.6/bin/log/1001.log
/home/aircom/mongodb-linux-i686-2.0.6/bin/mongod --dbpath /home/aircom/mongodb-linux-i686-2.0.6/bin/db1 --port 10002 --replSet blort/Server202:10001 --fork --logpath /home/aircom/mongodb-linux-i686-2.0.6/bin/log/1002.log
修改配置,如修改优先级等,可以利用优先级来控制主几点那个ji
conf=rs.conf()
conf.members[0].priority=3
conf.members[1].priority=2
conf.members[2].priority=1
conf.members[3].priority=0.5
rs.reconfig(conf)

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